采用相转移催化剂,氯代环已烷与二硫化钠溶液反应合成了二环已基二 硫醚.Dicyclohexyl disulfide was prepared by reaction of chlorocyclohexane and sodium disulfide using phase transfer catalyst ( PTC ) .确定大蒜素的成分主要包含二烯丙基一硫醚, 二烯丙基二硫醚, 二烯丙基三硫醚等在内的多种含硫化合物.The eff...
望远镜的物镜必须精确置于中心上.The object glass of a telescope must be accurately centred.此物镜仅产生很小的散射光.This objective produces only very little scattered light.由单透镜组成的物镜可作目视和照相观测用.Objectives which consist only of one lens can be used f...
A good Samaritan offered us a room in his house.一个好心人让我们住在他家的一间房里。...the parable of the Good Samaritan...“好撒马利亚人”的寓言A good Samaritan eventually came to her rescue.一位好Samaritan最终来了到她的抢救.But after you made such a sacrifice...
Thankfully, cascading dialogs have been falling from grace, but examples can still be found.幸好, 级联对话框已经失宠, 但我们仍然可以找到级联对话框的例子.Modeless dialogs are less common than their modal siblings.另一种对话框称为“非模态对话框”,它不如同胞姐妹模态对话框那么常见.Ma...
怀疑和忌妒，不管多么站不住脚，都可能毒害婚姻。Suspicion and jealousy, however ill-founded, can poison a marriage.毒理学家试图找出并了解毒害风险。Toxicologists attempt to identify and understand toxic hazards.她用复仇的思想来毒害他的心灵.She poisoned his mind with ideas of ...